Are Automated Tire Inflators Any Good?

Should you get a portable, automated tire inflator? I test the VIAIR EVC31 PRO: it’s a compact, capable tire Inflator tested in real-world scenarios.

An automated tire inflator is one of those tools you don’t realize you need until you’re stranded somewhere wishing you had one. I recently tested the VIAIR EVC31 PRO rechargeable portable compressor, and it might just be one of the best small inflators on the market: compact, powerful, and refreshingly easy to use.

Why It Matters

After decades of off-road driving in extreme conditions, I’ve learned one lesson: tire pressure matters. Whether you’re lowering PSI for traction on sand, dealing with air loss in freezing temps, or patching a slow leak, having a reliable compressor on hand can make the difference between continuing your trip or calling for a tow.

What makes the VIAIR EVC31 PRO intriguing is its size and flexibility. This compressor is barely larger than a medium water bottle, yet it can fill multiple tires using its built-in battery, or run all day from a vehicle’s 12V outlet. It’s designed for just about any car, from small sedans to full-size SUVs and light trucks.

Design and Features

The VIAIR EVC31 PRO packs three 2600mAh lithium batteries and can also run directly off your car’s 12V accessory port. It delivers up to 150 PSI and comes with a 30-inch air hose, allowing you to inflate a tire while standing upright — a nice ergonomic touch.

A digital display, preset pressure settings, and large, glove-friendly buttons make operation simple. According to VIAIR, it can inflate a typical passenger car tire from 25 to 35 PSI in about a minute. In my testing, that figure was realistic.

The unit’s compact form factor makes storage effortless. VIAIR claims it can fit in your glove box or under a seat, but I found an even better spot: it fits neatly in my truck’s door pocket cupholder, with room to spare.

The EVC31 PRO kit includes:

• Three-piece inflation tip set (for sports gear and bikes)
• Charging cord (USB-C)
• 12V power port adapter
• Carry bag (for hose and accessories)
• 3 LED light modes (useful in low-light roadside situations)

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Specs:

• Battery capacity: 3×2600mAh
• Run time: (approximately) 25 minutes
• Charging time: 2–3 hours
• Input: 5V / 2A via USB-C
• Air hose: 30 inches

My only real complaint? There’s no protective case for the compressor itself. The included bag holds accessories but leaves the central unit exposed. For a premium-priced inflator – typically $90–$120 online (mine came from RealTruck.com); a molded case would be a welcome addition. Additionally, a longer hose would be nice, but you can get one as an additional accessory.

Tested In the Real World

After a quick top-off charge via USB-C, I tossed the VIAIR into my truck and forgot about it—until I needed it. About 50 miles into a trip hauling a heavy rental trailer, I noticed a pull to the right. One of the trailer tires had a significant leak.

Within minutes, I had the VIAIR EVC31 PRO connected and buzzing. Despite its small size (and surprisingly loud output), it inflated the tire to full pressure quickly enough to finish the day’s drive without issue.

Later, a friend needed to fill the airbag suspension on his trailer after his onboard compressor failed. The VIAIR handled the job; slower, yes, but steady and consistent. It performed well enough that he immediately ordered one for himself.

Final Thoughts

Cheaper tire inflators exist, and many can technically get the job done. But few are this compact, versatile, and well-engineered. The VIAIR EVC31 PRO combines portability, dual power options, and user-friendly controls into a tool that feels premium and purposeful.

If you want a reliable backup inflator for your car, truck, or off-road kit, one that can handle daily use, not just emergencies, the VIAIR EVC31 PRO is a solid investment. A bit noisy? Sure. Lacking a hard case? Yes. But when you’re miles from anywhere and your tire’s going soft, this little machine’s hum will be music to your ears. It’s quick to implement, compact, and the compressor’s battery can power other devices—it just makes sense. I will bring this little device on every off-road or adventure trip I take in my own ride.

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